Campbell CR800 Series User Manual

Section 7. Installation
130
Data Types in Final-Storage Memory
Name Argument Description
Word
Size
(Bytes)
Notes Resolution / Range
NSEC
NSEC
Time stamp 8
Divided up as four bytes of
seconds since 1990 and four bytes
of nanoseconds into the second.
Used to record and process time
data. See NSEC Data Type
(p. 198).
1 nanosecond
String
String
ASCII string
Minimum
: 3 (4
with null
terminato
r)
Default:
24
Maximu
m:
limited
only to
the size of
available
CR800
memory.
See caution.
1
String size is defined by the
CR800 operating system and
CRBasic program.
When converting from STRING
to FLOAT, numerics at the
beginning of a string convert, but
conversion stops when a non-
numeric is encountered. If the
string begins with a non-numeric,
the FLOAT will be NAN. If the
string contains multiple numeric
values separated by non-numeric
characters, the SplitStr()
instruction can be used to parse
out the numeric values. See the
sections String Operations (p. 303)
and Serial I/O (p. 279)..
Unless declared otherwise, string size
is 24 bytes or characters. String size is
allocated in multiples of four bytes; for
example, String * 25, String * 26,
String * 27, and String * 28 allocate
28 bytes (27 usable). Minimum string
size is 4 (3 usable). See CRBasic
Editor Help for more information.
Maximum length is limited only by
available CR800 memory. As a
special case, a string can be declared as
String * 1. This allows the efficient
storage of a single character. The string
will take up 4 bytes in memory and
when stored in a data table, but it will
hold only one character.
Data Type Declarations
'This program example demonstrates various data type declarations.
'Data type declarations associated with any one variable occur twice: first in a Public
'or Dim statement, then in a DataTable/EndTable segment. If not otherwise specified, data
'types default to floating point: As Float in Public or Dim declarations, FP2 in data
'table declarations.
'Float Variable Examples
Public Z
Public X As Float
'Long Variable Example
Public CR800Time As Long
Public PosCounter As Long
Public PosNegCounter As Long

Campbell CR800 Series Specifications

General

Brand	Campbell
Model	CR800 Series
Category	Data Loggers
Language	English